{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0xf3f83863814ac2bfb640afe318a35091cad81cd2fedafd4274305a2189c4c306",
    "signature": "0x345995543e4c3de2a40fb69eac283e36449847d413f12322c32bafdf3e11413a1ec7e582e74cde04754809937b0a34d2dd741d7805bde1bc050d8ee25a60c2861c",
    "signer": "0x738Fb353b57EdB4d1f33c0049D33b204243db2ad",
    "userId": "693463302"
  }
}