{
  "manageEntity": {
    "action": "Save",
    "entityId": "589358997",
    "entityType": "Track",
    "nonce": "0x6a346c0f4e93ff37e43804afb6575235421de03938c077df9d861bcd99526594",
    "signature": "0x3db501dbff3de20d2622431e9ab86f0f0c5bc396f7f5feeeebfcd2ab854d0d3d5350f95eea93bbbc63cbccc3c31bb22f47ce1b575bf18974b145b1ee65af9e431c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}