{
  "manageEntity": {
    "action": "Save",
    "entityId": "543867105",
    "entityType": "Track",
    "nonce": "0x6a5ca4b92e7cffa2b1fa10339506c74041d4b2bbae4b136a6c46336a3aba0eed",
    "signature": "0x70d06b85659deaa8faac60859d9718a7f6f10d522f8fbac86f453bf039936b69664417d8fef7cd6abb281d81726f05489c31fdce86ed4984e1f3f627f92cadcb1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}