{
  "manageEntity": {
    "action": "Save",
    "entityId": "426233292",
    "entityType": "Track",
    "nonce": "0x1c4e3d3533f0b92783dd74748069be4f038ec3b7421be9fca3df359ce2568dc9",
    "signature": "0xddda4aa961695133553fcf2b0d426d2d44ef6e5adf8efefb244e367da268363155d293ba4bed9d0f1d422d31e644073ec597924e1c56cbc039b3a14f61e278d21b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}