{
  "manageEntity": {
    "action": "Save",
    "entityId": "1543250953",
    "entityType": "Track",
    "nonce": "0x38d0abdecce1042c9e5a61bd71b31aa437163465a14edd41563151430c381cc8",
    "signature": "0xcba6d89b7e293282d6c816728e32ea1ae9304385c068ff2fd786167a9532029818c60a90b5518361a7d0ab216032c96ad541d2bda4bf9746af6a38ea2d183c4d1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}