{
  "manageEntity": {
    "action": "Save",
    "entityId": "2083702458",
    "entityType": "Track",
    "nonce": "0x95535d0a5178b9dd666e8bc90a8c7d0ab7de045f373fa8a0063739594301d44a",
    "signature": "0xe086782dff7cd57deeea572bde71d2829c4e54467e1349b92ded3b72820b900d34d5626ece0f2b9b2e7125c6e5ae3f73044801693704913605c726d7c90edd7f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}