{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708128965",
    "entityType": "Track",
    "nonce": "0x76c2c714dd16696dc4d76d41f33f00fe67482cc81854ba863a146d148dad0dbf",
    "signature": "0x9cf05b013ad3e3a149741008f8a1b3e677ade79b8dabaecea67e25f5ed3635ea55e419badb55fd1f888662f7d764f3753ef4583cce1cf2c3ca99deb0bde8c1d01c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}