{
  "manageEntity": {
    "action": "Save",
    "entityId": "267859",
    "entityType": "Track",
    "nonce": "0x99d7dd6ca0d3399d80ba27e4381244089aec063e7a75afd57bf11ff23a4a9649",
    "signature": "0x6f246c4b4ad6a1372b432c73138761265c7e7014a2e114f1ab1c11d6e3ed2b7c3b29c33320bb059b3a60c7ef8ef06b27e89b6ce4a5842561a4e4a1626371a2f11c",
    "signer": "0x4196A73fbD10a4CfcE1a901373D63670f1AC221e",
    "userId": "799736510"
  }
}