{
  "manageEntity": {
    "action": "Save",
    "entityId": "1469168487",
    "entityType": "Track",
    "nonce": "0x00aab47bb7b8cc2998e56641a2b738f63bd8ca4bd494d28eeadcfe0ee91c75f1",
    "signature": "0x0b7473cded670374f847c929c1019744cb2cda361f53ea06b26e9d8ed00bfd4d3913051350bdccccab3d44963b63431677bf4bdfc1bc69863291450b398f4e8c1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}