{
  "manageEntity": {
    "action": "Save",
    "entityId": "307147106",
    "entityType": "Track",
    "nonce": "0x48ecc74708a0a68b4376d6468794660d9f58357bf79aa44c6d861b456aeeab20",
    "signature": "0xf0845ebbe697d17bb55c80ac64a2310ac61ff893f8e9fcf55a1e176a29f8776a085f63bb857ebf464fa65882e99341b97e8a88412ff6c36d3b28a729c9701c5c1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}