{
  "manageEntity": {
    "action": "Save",
    "entityId": "1231769075",
    "entityType": "Track",
    "nonce": "0x00abc4819e9bf7cdadf304f968cc31ce48bca88131528056bf41607c8a98c5c3",
    "signature": "0x86b02bcd5ee7926db4ac0958e003472a9208fc83fb5efdc044df1bdda708126a650180c93e66a5089c3002005df7cf7950acb966447517dc5fa457f98aa7a6141b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}