{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375936961",
    "entityType": "Track",
    "nonce": "0xad75fd09e7857a7fc8822316f4186794d3fbfddf0adfbba83b2afe257874776b",
    "signature": "0xb946840e4520951696ecf73aa70e234f2f2616c4fe7fd23609f3a057c8b9f09d0922b872dcddd3d701a353edf8f009d82f82896930b0f2d2ace5bd1cbb3994661c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}