{
  "manageEntity": {
    "action": "Save",
    "entityId": "234696373",
    "entityType": "Track",
    "nonce": "0xf08b4523de733dd7a922f09266cbf703f5b745ac0d853fe9d7f263f6039d01c2",
    "signature": "0xe4d5896a54adfb4c198a6fd1c889e5a497063aa5469299d736f2248fd11e123e26b29dae73c73cac6d338d0349ed5e1e06545fe3a12ed89e972ff4e2fdd522bc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}