{
  "manageEntity": {
    "action": "Save",
    "entityId": "1384401622",
    "entityType": "Track",
    "nonce": "0xab6dd31eaa550d5f5676fe00a9bf1ef014eff6c02d1df6b67e7a5fad9aba75d7",
    "signature": "0x7d5bca3e09b90b360b226435bcc421798ca3eec0a556c5c27e9210e9b01f670b09eafcde0196852db567e14d0830d85910c32981bb4045af71a609dcad32202d1b",
    "signer": "0xbf1f8021D15fDffe83FE44dA0b0c9CE22371359e",
    "userId": "276678878"
  }
}