{
  "manageEntity": {
    "action": "Save",
    "entityId": "163311",
    "entityType": "Track",
    "nonce": "0x928ee15931eaa458b3f87a9228cc3e709695ff8f87f3ee8f9d53e9633c4980fb",
    "signature": "0xb5f8feed026b520177ae3efe47a2bced79b326ea0d26b39fec8daaa0722f38f84d7e796074ac3fe3642158b83242181b9b0207ac407da3cd0ad1347877c5d00a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}