{
  "manageEntity": {
    "action": "Save",
    "entityId": "252059",
    "entityType": "Track",
    "nonce": "0x73fb9feea895e5cb2c81ab1aba8b84cab4841d8651ecf5391da80780a65b3d72",
    "signature": "0x4a906ccd9ddf0e47191522575e1c76ea838f5267bf6f8afaf7971bc30e00b3217802fabcc26fb569aed66bc3afef732402bf8bdf81fdeb8c608c203b84f2313b1b",
    "signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
    "userId": "353834"
  }
}