{
  "manageEntity": {
    "action": "Save",
    "entityId": "915896",
    "entityType": "Track",
    "nonce": "0xb85203a072c029532193e3c107fb26e0b1f42899c553ff236fd681459d021461",
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    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}