{
  "manageEntity": {
    "action": "Save",
    "entityId": "1009978",
    "entityType": "Track",
    "nonce": "0xa3fec8d35467d736229ee48aaa1d4ff776cd55cf836157b55ead38f12235e888",
    "signature": "0xddc313277f77be5ca2c6544f22ec6c5116f9518ac2e1d9d029bbc1abb3a9bd1776df866bff175be6064d45b708454672f642bc5b3acfb9a5538bf3c2953c4cf71c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}