{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156313885",
    "entityType": "Track",
    "nonce": "0xc694d03983f4b279aadd22f9408d855b8dcbe49b5bccc37a6e03c7c383da7929",
    "signature": "0x328af89ec14fc28838ef3d85d5bc6eba8b73e8853dc1dfa32d3fd0a0017b89631ae9608993a371b6dbfcf85428998052dd6c05f8e7dd4de2a3ce2f3d4d020a751b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}