{
  "manageEntity": {
    "action": "Save",
    "entityId": "29557291",
    "entityType": "Track",
    "nonce": "0x4c72eb6f5479097da78b13c4c6a1922905ba8201ce44fb25784d6c8b6dd32e8d",
    "signature": "0x69115ada47486dad40ba9366f67f941d22e005e414c55373f7ed925988a5adbe4463f01057b6e98b6cc1d686bc7e6d481bfc6a5d280abec359bc350a8192ae461c",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}