{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941529130",
    "entityType": "Track",
    "nonce": "0x9616c7a4680dec200b17464d6dd7c9a14571ee2fc00563e36ba0b4bf6d26c360",
    "signature": "0xa5747e9f2ffdc3b9a3f19b6570759fad8561b83cf706d4b5307f195964b7aea9063188546e36cd1da88ee1f38a93111e7d8893265925a4c2f1eead91a3bcc6f81c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}