{
  "manageEntity": {
    "action": "Save",
    "entityId": "985424047",
    "entityType": "Track",
    "nonce": "0xfcafbbfec34905f3c1b6a070829efbad881bc5d6ba5c83161fe8d0cf21666f79",
    "signature": "0xfdfd2d19e1b809a78035ff3074599137f0a53b6b7506bdcca8bc14be8fa3cfdb5422fb2f49b410343180036bd563dbfd875ab6d46346dab2a3a5f7b2eee498151c",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}