{
  "manageEntity": {
    "action": "Save",
    "entityId": "41070361",
    "entityType": "Track",
    "nonce": "0x8e2575a7d34717f6c18a80b796108462348387b0839b45a59a6d416d3d9f93b1",
    "signature": "0xe257725ac24810081f1a9a0215e83b9bb491298d984a0a98328d05918ca1face09a958c406639905221d171014acbd913abe56c789916a4b0a7d60b7b146f90a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}