{
  "manageEntity": {
    "action": "Save",
    "entityId": "120712118",
    "entityType": "Track",
    "nonce": "0x3ae9fc5ff2a52a9f76ccdb857c578280868b3b91cdcc3068633e8c68ee1b0866",
    "signature": "0xa3906c3fde679924ebc77912bd76e75b21dc5c75a33ad159280e33e87f7ae57b2db1d1d95f34e62a376fa63637343b1906c9b1d2bf1c43e5156fb62b72f3de131c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}