{
  "manageEntity": {
    "action": "Save",
    "entityId": "921149",
    "entityType": "Track",
    "nonce": "0xf94d90dd963eb83d03930d73ee317ba24b1862ddf23be8f49dec1d0096bb558e",
    "signature": "0x6331177a2fcf3b61f23238e50e6917dd014c927f04d95a0573931ba00a89c88110b5aa792fb4add169fd78251589149742595b2e76ad14197fdca452dd5457861b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}