{
  "manageEntity": {
    "action": "Save",
    "entityId": "2050514288",
    "entityType": "Track",
    "nonce": "0x9df82642788bf098cbdd18aee7431cea1f32f640d10fea8eecc9e52cb2959569",
    "signature": "0x7944f3b9728e92a37bfa06728614c3c6fd0a11ba978674f362a1fd59fa950e1d31eef8d7c3797906cdf5da3a54b4143903c171f8e4557120d9dd1fc4efead3de1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}