{
  "manageEntity": {
    "action": "Save",
    "entityId": "1697252595",
    "entityType": "Track",
    "nonce": "0x1245bc7d6ba71225779b3f8f44e1daff905a6e80b2396efb94ba7750ccc9e203",
    "signature": "0x151e7ba21089ebb58eca6a45083076f49e32e5e3e35252dc1e02202c36668b3e133293264a12a2ee964168f90fa588bd4535422e2f309122f5a74c94535d7ce11b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}