{
  "manageEntity": {
    "action": "Save",
    "entityId": "676399335",
    "entityType": "Track",
    "nonce": "0x5572daef4699cc0c18bcd2854bc58db73d9be395583e609986621164434a2a70",
    "signature": "0xbb71931cb6f7e28caa329e039e80e6ea0fcefc694a59a61cb0966199ba837eeb57f1eb45787b0ca217a14da62571af31b0b17b72353e14969c9b0d5a33c898b71b",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}