{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089991432",
    "entityType": "Track",
    "nonce": "0xbb8a629db11c413aa84d93a5be3efa1d869e1aaabaec094a658b2d10c3ffe5c5",
    "signature": "0x48eb414faba0c4ce058269fd3a784e4d5df6463bdcc5cfc9f225888ec36c8fec4d0df13155a0afb7eae79400e48e5c6019d5560d8591b9fb154c25712baa49d31b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}