{
  "manageEntity": {
    "action": "Save",
    "entityId": "675098076",
    "entityType": "Track",
    "nonce": "0xe7ae8cdc2c3d52e76f9ce590149184bcfb6f45ee20b56b56f0fb9e5e15eb2514",
    "signature": "0x925efae922117cfe2f36d5357766b2bfb0a65154001d1873e9eb519e193747037be8ddebae7fdb48c7e186b77fd6bf935f100b3522a7c0511e04b90c7447680a1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}