{
  "manageEntity": {
    "action": "Save",
    "entityId": "1866233740",
    "entityType": "Track",
    "nonce": "0x3a4c1f2151761f033bccf15cfc71ce7153ebc55064fc7e384ffeb3e7075b2bfe",
    "signature": "0x46ffb5a8c0d94722867668c15fc66d58dd7de4e8574f97eecd91500a71b4851b3eb57979f5f31252c00affde647a3d324112fb6cd57de62f56885bfa277034a41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}