{
  "manageEntity": {
    "action": "Save",
    "entityId": "30376052",
    "entityType": "Track",
    "nonce": "0x1faa5a57de3fdfd7e60ad660365be9acfb13f9971fbc3606e857eb40f1e6be0a",
    "signature": "0x0c9212a30c7ef853ae2853c56919c7576936bc4416a49b97c073a7b385d209ad67a56e91623417b4c629990e47708e01fbe3bebb8264f0f058a253e26e5570761c",
    "signer": "0x97Ce19D122F5b51231cF4DBbd25Ac36CBDd6CACa",
    "userId": "426864186"
  }
}