{
  "manageEntity": {
    "action": "Save",
    "entityId": "1767743577",
    "entityType": "Track",
    "nonce": "0x26996ffc7e923c1491661423ad9593805755c3676a91f3e75b8d6f5868f2b73f",
    "signature": "0x78ad2983eee9b4af5643068b87ec895a00db2e3569e8e4a7d78baf0d790e6f835309a799efad57bb42e360a2d438d235172f90b2e4f05fe94b75745bb35f65671b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}