{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385116001",
    "entityType": "Track",
    "nonce": "0xd084c37d5fc5303a0c31e9af6c1bf031a2793067ac97a742fd4185e913ce6ea8",
    "signature": "0x53ab6bfac42254547bb6d9b4945b2f24bb90f443ee8f30b52834644bda35fc4d2aa9fd151fdf5d9dd148faf795e4d7d8b2d2913f15a568f253949a371353090e1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}