{
  "manageEntity": {
    "action": "Save",
    "entityId": "2012565165",
    "entityType": "Track",
    "nonce": "0x39e970e19f5e0db71fa9ab2e1e81d6a5ae9a92572df9819c57de2b983a9331e1",
    "signature": "0xa9bd514d9694d6f1ee66e999520e993b07b1558e4b83309144b0990a4783411711b5f91a2030d2b2abf56f41b693a528a4615415abd9ebdba2e77e9e651b815d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}