{
  "manageEntity": {
    "action": "Save",
    "entityId": "234390087",
    "entityType": "Track",
    "nonce": "0x00a2e25ee178259bb0d6282fbc8bc14436626215873a036f0a5e29c7ad7c691d",
    "signature": "0xe97490491031b196f4b777705efb760a3262abf50e1a3c6ca807d2e20f5e63e05d45c66bcc10a8c7e44ba5fdf88965a1265fbbd27af6880e26433e16cab208731c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}