{
  "manageEntity": {
    "action": "Save",
    "entityId": "1139648113",
    "entityType": "Track",
    "nonce": "0xa48f14a6bbe1c3c2894f0eeb6a1323643c4799efa4e4c7247c1afe859d89448d",
    "signature": "0x2698c9b1f92f95645c4bbfc28b0d54a09c105e93f161278c3457864f1113cb2148e2497be115c4aa52b9f8dc44df033c4c95d271bc5aa59b92ae85eecf3526c21c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}