{
  "manageEntity": {
    "action": "Save",
    "entityId": "1929065587",
    "entityType": "Track",
    "nonce": "0xeff6c7c0f5a9249c7cf2d7d18382fbdfebfddcf28b5cbd2d667a6be7d188758b",
    "signature": "0xb39d615c419f04b643d3efb123190b7f870994c4d30d70970b456024059ef6e92d718c15693189bd078e2701b12257724dc24c7528c9535db7572731d3ca547f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}