{
  "manageEntity": {
    "action": "Save",
    "entityId": "1857121446",
    "entityType": "Track",
    "nonce": "0x8e7f4c82e43976b0680aaeb7e9d5eab488ac682dd8fba8eb71b9fa7771a3bc68",
    "signature": "0xe2be211aeca730515c921322a738faa9dbf8116b94bab88258280030a4b9fa6f77ffa1bbd3d617be115994d42af441d0cbfd3d446a0427a0e0f36b89a08b9b731b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}