{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285265826",
    "entityType": "Track",
    "nonce": "0x35be8fc68b7f64a55ac0359ce36f6cf49aeaa7e053fee3b554f9c0d144b709c8",
    "signature": "0x7b93c9513da2c1c8c8483051a6c12a75dc32346b05976b960eb03156ea5309e9673cb8ce1ca9e5875aa87f412f2432bdc439505f552edcae96bd59eda33c13f11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}