{
  "manageEntity": {
    "action": "Save",
    "entityId": "830900014",
    "entityType": "Track",
    "nonce": "0x08de52af3ad17afd99b7165bda0a3d6988643f49402c624d94ffed5de183d3ed",
    "signature": "0x6296066fe59eb321bce7780c11b58426ee05cd6d49fc23105e67cdaaafc266181b5af383093ef5b2127677c86ee169937cd64d333c964f513a56728ae9d426a31b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}