{
  "manageEntity": {
    "action": "Save",
    "entityId": "157708680",
    "entityType": "Track",
    "nonce": "0x71abd09d264baee6ca66872c9119b40375f1148106fb64f08deed1db6689b704",
    "signature": "0x2c52135f49676f6adc00cae40fa195df5d2433745d966796ac03a91ad0827ed16467219511801843c7c1b358ac2dbcd8fc3d77449bf68ebbdf412aebf78f77371b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}