{
  "manageEntity": {
    "action": "Save",
    "entityId": "474511437",
    "entityType": "Track",
    "nonce": "0xa6aa62b7de21e8fa14d53f111dd55a1ced9f01b429283aa11c1f2dbb7ae39584",
    "signature": "0x629fc34cb5415d60b03a5af9dae154832d22b5daa3ca0873bdc4ad1a88227f176c9b2dfe8d08cfd3d72ef0eab357ae57fc35bd64b0e67ac6ea73017f4b3ce4d51c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}