{
  "manageEntity": {
    "action": "Save",
    "entityId": "118591",
    "entityType": "Track",
    "nonce": "0xa5d9e6e898037698a3506847ddd0b3a0153f7c37a30171328315856a6407c4bc",
    "signature": "0xec9e209f1b098c6bb5743694f4be3b0e1553710e0a07580e40e283d76b819a727440f150bd14bc439a0e98668f962cbc7e3b5298ced7d43b550ad17744ca3e571c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}