{
  "manageEntity": {
    "action": "Save",
    "entityId": "10556325",
    "entityType": "Track",
    "nonce": "0x6703c4451c34b50246945bda52d6d7a7209bdfdf3acc70cfc7e47aae0e2b4376",
    "signature": "0x69c987f6f16762d3e1ba444f680429321fafdff17af24eeed22bd5be7abd71e2205da0b8a97ff6956ed7ae044dfc4c554b5838c91935711d52b8c17befac954c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}