{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981270869",
    "entityType": "Track",
    "nonce": "0x2845555f9a0ffb7171bb72a16ccf04ef8e49604186faf5b33354ede22fd6b6a7",
    "signature": "0x8420260e52ee36183fa9b2d5038809768d02609b3c080fd92a23e49cec710d1c70d8118866fe286e4cde260fbfcb13c7ae4155f9cd64ab252fbb0b530169eb701c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}