{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892405197",
    "entityType": "Track",
    "nonce": "1780843197609224046",
    "signature": "0xa5d97583ce1b02a7350e435266afca9bf1d8a1b1d40ea9f83a68f60e5e37523d08eaa69b96320288b751fefe8ba6018a0f9f1c88e5e89a87eeccf3bb1a4bce601c",
    "signer": "0x286E7ad8f9447D0112953Bdb1684A4b4192ECb76",
    "userId": "210545"
  }
}