{
  "manageEntity": {
    "action": "Save",
    "entityId": "1966613536",
    "entityType": "Track",
    "nonce": "0xf50a3a33de835fd03bda82377adc32b899b6bb044477f5c522e3eec5efff08b9",
    "signature": "0x0fc413c055af311b315fce50c18e2733882eb97dcaf887296a9340608f54b8eb449caba40d8cf28f0596362451eec3b8a755d3d6e0c6514f29e4db4e709e0dac1c",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}