{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054990",
    "entityType": "Track",
    "nonce": "0xe7d0cd1adba0c4ed4f510e3783320084c0b4bda579d26eafeb3b9e2cc1311554",
    "signature": "0x1d202efccc6e4385a6f5cf39a2adeb13076c8e9f53aa61190d0b9143b1eb0c593686c6e561831e8895d017bd6b4fdb61103db528f3d57981cb32a744fc8220891b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}