{
  "manageEntity": {
    "action": "Save",
    "entityId": "1236273909",
    "entityType": "Track",
    "nonce": "0x10c6f7915beab21d68c10b77cdde2b3203114a5559fc5e631821612612a9361b",
    "signature": "0xe0e38751382ab693f500465d213abcfc1fcf81aa0f6819a8527a9cf688a7b8a5758515d50cdcde9edc54ccc24d71d0e502b1b2cf674e76183a0b028a8d1a0bc91c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}