{
  "manageEntity": {
    "action": "Save",
    "entityId": "717374928",
    "entityType": "Track",
    "nonce": "0xe919f3854d2d69fb1432e431061842e13cdc89a768db000a794a31acc1c9250e",
    "signature": "0x014a1e788946d7c50dc4524ef1b05a11b66fcc911a32f1973758c1626995ba0b0950ebd7423bc54e786ffd688a39b2969714f0f0bf01a9f8127378bda571c55c1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}