{
  "manageEntity": {
    "action": "Save",
    "entityId": "209230",
    "entityType": "Track",
    "nonce": "0x86e10951487af4ddfbf0cd6cfd206fe46e6792aa72f67a842e8ccd908feb4ce9",
    "signature": "0xc9abb565fed1c5d4842f0fc1d2d48e7da87874cc56a67996fc1d03b5551bc2e6763f2d11af6be34607a1c9832fd5897e7b4f5e3a22163335e0bd99fda861c4931c",
    "signer": "0x436637bD14cdBAb950deA5e8ab694896216708Ad",
    "userId": "234122192"
  }
}