{
  "manageEntity": {
    "action": "Save",
    "entityId": "48697928",
    "entityType": "Track",
    "nonce": "0x880ee5035f7f978b1e63a67aeea88ed3114bd8ac1dceb08b8cf97b118777bfcd",
    "signature": "0xdce6c47cb5d09d1d81de746cb7958b4531ccc15d0b5b8522a37ba9b62b9b83082dc9f5e972aeb8bd12111c821d5357a404f3a9ab720b45b675ea572a3e24a7e31b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}