{
  "manageEntity": {
    "action": "Save",
    "entityId": "940381998",
    "entityType": "Track",
    "nonce": "0x77987cb152bc0ed15e31fee86db87335b5d736491dfc2ad3eadb3051c58a3fd0",
    "signature": "0x0bdac72131702112376ec38a0ce5cf6d27a07d09cc57b00795345e5f5f184830262ed1bbf264fffe0ec3f6bb5c183ce56c1c31b2f722032bd31d9efe8843ae561c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}