{
  "manageEntity": {
    "action": "Save",
    "entityId": "1313050846",
    "entityType": "Track",
    "nonce": "0x347eade862c1dff30c084eb1ba07552a77f2934d2513969387b342544538fdd5",
    "signature": "0x7a902ee8a79c2bbaceadf43b86f56538131c44d0d627f02e22adca94c108657f7827ec81b438cbab7e06a0ffa5faf229b8fd6b65b6503aff4e85551eed33bc6b1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}