{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078469",
    "entityType": "Track",
    "nonce": "0xe14b01f5f56abe6256594c1d093199448fad7c177dc6403ae172ee33de440df6",
    "signature": "0xfe76019568e6843d19b1d5daf5207a82fda2c1ae19e410ffa74dc79ac5bc6d2a55d950654ed2452449bdc2ac97b2ba84229f43960fabbc8bf28880b10489e3901c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}