{
  "manageEntity": {
    "action": "Save",
    "entityId": "299205",
    "entityType": "Track",
    "nonce": "0x7334e89f82dc44367294e5e4b953906940f6d0b8bfae90adcaf8be0557e596e7",
    "signature": "0x5cf20e25a6de161a83098f61aa121928cc0e45558a07f790260176e8fe70c9625838ced962092552f452dc1c20143f8938ed98aa147cd93f75d0902f55f98f5a1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}