{
  "manageEntity": {
    "action": "Save",
    "entityId": "849895862",
    "entityType": "Track",
    "nonce": "0x3a51b82e27b2ca884513b73d2001b4afbdee19ae272cfb08b347b80bab244b62",
    "signature": "0x100e1d0f20aad8231201064e3b5a0dc275dd77d942b953eafff00478289792b250725ecb73390b873779770f4d23c517dc3b6e4662aef5a6c0df19434548d7941b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}