{
  "manageEntity": {
    "action": "Save",
    "entityId": "178727052",
    "entityType": "Track",
    "nonce": "0xf3f47ad10f5be993270be4643b70ef23f53f015cc1e9953b6dffe1a30cb0fcc2",
    "signature": "0x72fc862bb5efe348e68b9ef97de2fe701f6f1e3f4b6e545e497d9bc2b92c92950da58c54607569fd0c539023e7f0dd3028434440643c982dd3804d4b32e3c0c61b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}