{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128910748",
    "entityType": "Track",
    "nonce": "0x3adcd1e67cfffd5cb75120a4af2c4dac0b50348f61230bd1ce8eaaf3462af532",
    "signature": "0x8dfd6c4802450c9d133810911f45b8bf8de9e1f17ac1fc6cf8368623ad5b2a30148bd7b522c901babdd0a4d8fc52e0aa1efc2c7109dd8c6b91fda3afaccbb3691b",
    "signer": "0x1C300e5E04FdAf8E3c88c331b626A6a904685D08",
    "userId": "631253118"
  }
}