{
  "manageEntity": {
    "action": "Save",
    "entityId": "368345",
    "entityType": "Track",
    "nonce": "0xf2d07d773563134de61377a656c08f38cffca824bcdf18110c3b4053046645d9",
    "signature": "0xd6810c3cf97289c6fca1f104ba8e08872c3f3a517a21b035b467c71ba13ecbee6de3c3b14331f3d2c08e21dfc5144774be56721863e66eba377be09db37ccac11c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}