{
  "manageEntity": {
    "action": "Save",
    "entityId": "939854319",
    "entityType": "Track",
    "nonce": "0xc7138e6cc5de7e0f92b743c9cc85f97b7caab1df608853a53cb74f35a27f0ba8",
    "signature": "0x0846c0752ec186e13dec41f91ab2830deeb5ab29da7515222379c26610d31ef37e48c759874e7df1709bc66906b878028d0f318aef94e89a22f4ec7e1c101ced1c",
    "signer": "0xC08bE28cf05cBcaE3094E0FbAbfA61ca8Ad61dc1",
    "userId": "190259218"
  }
}