{
  "manageEntity": {
    "action": "Save",
    "entityId": "1826741593",
    "entityType": "Track",
    "nonce": "0x89f1c2ee2cce78416c71edeb55726ef96c21e701cb338be987afb7bb56b81d34",
    "signature": "0xe42b6be7d21f9593b4316e72091b46cb56f7049d41df23c9b48a27c232a104ba5fc2781a2d53689aed81a00b6587730d3cabe87bcb835e83c4b19ec89e9ad7501b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}