{
  "manageEntity": {
    "action": "Save",
    "entityId": "379133129",
    "entityType": "Track",
    "nonce": "0x5aba5c3a2829216cc4aa96a80319fbd3c836177da85c66ac3bc9ba01ae9e6ea3",
    "signature": "0x51407f7b7088bde0ce0e052cf7f8c535dfebb4cc56051fe4f821d433eaad478a428f28a2867598461476888f80c1bfa4809ad33e2ac37e283416ad4d6724c3c71b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}