{
  "manageEntity": {
    "action": "Save",
    "entityId": "817319815",
    "entityType": "Track",
    "nonce": "0x37c108042f0fc1c8a4f2124f81804de37b23cdf313124557a2a0fa8e8e0a4314",
    "signature": "0x76e8be53360f5026b3798519a9ee16e194c21de561b23b150b39794cf3fd7a8d6cd7b4a4a3a7a579ede191de68cd3cc33e68bf0865fb770189d89b698d80ed541c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}