{
  "manageEntity": {
    "action": "Save",
    "entityId": "555853707",
    "entityType": "Track",
    "nonce": "0xa08e3d1f47d5316b4f81fdcd5a20deca8df7148e9a32fa7ef11aef8edb037be6",
    "signature": "0x0f00cf9ff92bff3a01312591c6ba7e8cd483ca18802b2b62ef7c7d168c0143810edd28cefb8a938baff71196df91254b6554d309326826e19e0bc14c7c6ef4f71b",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}