{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1919489964",
    "entityType": "Track",
    "nonce": "0xdc6f0f18f9d1950068dd20384d004fce9720fb63c8682be316217102b27d2058",
    "signature": "0x85b1f1837d201471a7b592d2941817c87b5620662b12e39722a09beee10b02837d7b639811e0e83685c6112d3a59d96cf5487f9669273e74fecf6858fdc7ddd51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}