{
  "manageEntity": {
    "action": "Save",
    "entityId": "949235023",
    "entityType": "Track",
    "nonce": "0x7c988424642bfe355fbb488a6a74b1da327df2248c8bce5bd7b86f15a46b5599",
    "signature": "0xfc68a8d9bd01611dadaae0d174d04ca959607fa71676c292c4ae67b6120826b33229e1625e3db62decffbac2719b079c6813d156420394980568d5929d56ed751b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}