{
  "manageEntity": {
    "action": "Save",
    "entityId": "1818493952",
    "entityType": "Track",
    "nonce": "0x52d3354400f2cbf86584061cff748cea03de172f1f2755cccefde77221de23bc",
    "signature": "0xef48315b79641e05e3f12d6301a8649782ed0dff1cffa3e39ff50f82ea35c9876f0d8484f46ceca4c3340fc589509948fd5543ab95b8848ea147304cd5425a421c",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}