{
  "manageEntity": {
    "action": "Save",
    "entityId": "9437889",
    "entityType": "Track",
    "nonce": "0x94fd11f56e5096b6231491efb904785d74cc87c80460ce621f718e769bf36129",
    "signature": "0x1ed5902933c7e49112eeca082ba7bbf89c282649b6a96967f9505677e2592df5334bab1674f2e4e9db92094b5589986f87f345acf0b6ffa6ecc93041a96e38001b",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}