{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249442760",
    "entityType": "Track",
    "nonce": "0x0c8861503b6acfe9eb2d6182b194826d0afeb28e82facdf55dc497c3cd548c92",
    "signature": "0xa5e79ec9dacebf2d7e743db059728c7ab3258afe9fce48ec54792400e7bff2d40eb151fde9b32e8d7b933861e87b34314b416460cecfcac756181b53439a18a91b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}