{
  "manageEntity": {
    "action": "Save",
    "entityId": "1006269540",
    "entityType": "Track",
    "nonce": "0x2dbaeb19350b0348bd3e27211cb428a1a63762e86a1c3e000657670f4736550c",
    "signature": "0x86549fd5ad56e193c46539310b31b04b5c3e261cc9ad5aa3a670671d4277a695585265d71e256fe92e2bd135772cf6d847dbad0e944424002920b5dcbe966a021b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}