{
  "manageEntity": {
    "action": "Save",
    "entityId": "1535584902",
    "entityType": "Track",
    "nonce": "0xb3f8e42c0030f37e5d82e34eac5e7f780ef35e38c17bb888006db846880affde",
    "signature": "0x1ff482532d9efa78eab84243acffbef775c22f0d7a63115954aa6d4b77ce25fc42324579e5960b6eb265557ac76037b6433b56e04be7a9330b891482fbf608b91c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}