{
  "manageEntity": {
    "action": "Save",
    "entityId": "120846",
    "entityType": "Track",
    "nonce": "0x4f5244136a7c864beaf079a68b97fc644b3e76645d32ac0d7925e03faf3c2e43",
    "signature": "0xf4fc30cb36d443dabe9d5dd461ce95f4319058ffe8eea84e898377396c69215c356512cf31d72970cd337e5059df20e0c675bbe77cbad17a1d19c8b84cc86cfc1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}