{
  "manageEntity": {
    "action": "Save",
    "entityId": "984045691",
    "entityType": "Track",
    "nonce": "0x963cb54591cd3a14343a5317599659a7a4a5531bf3efc66e3a011ba2679f8134",
    "signature": "0x75e3630416fbbe4797f8af4db9cf7b7aad279bd881f85d54c30a7ce3234ba94864f34932f9207e829cd64a060164e2c725129994366246e1af06725411e3b0f01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}