{
  "manageEntity": {
    "action": "Save",
    "entityId": "703072139",
    "entityType": "Track",
    "nonce": "0xceff73625029c202504f36bbdde4f3f7463a9ddbf0948a51f8cab3bcf2a8439a",
    "signature": "0x25780d26f3af82aeb1a3a691f89992d1c1d4a9588020049dcf0aedd20a55325740609f1878315ac27b2ff28a3fbb4ac0920d7e2a66a6668c36e091199a4b20d31c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}