{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994924025",
    "entityType": "Track",
    "nonce": "0x6a4ca50141c6abff1bf7454d371257141aaad210d3438cbc732f26fb22924107",
    "signature": "0x7d90edd2b865fbe7ae6121cd4a7bda2cc60ac8ab2d75ae4a26b40378a9d12fc155bf87631823f58fec1ffeed69867b1d179373170feff4025dc56c48d30e82671b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}