{
  "manageEntity": {
    "action": "Save",
    "entityId": "776204729",
    "entityType": "Track",
    "nonce": "0xa3d6e508c8079ddf3d94b3a709f94a659d690d3246f28cc07d98b43bcc077239",
    "signature": "0xdb6fc2a0d4304777e284f9997f45e3d189c7e5fe7da6364f9a8313fe1d9e7cd172cebb6beef1f05f3fd55edec7d127c6c18b4156da8aa569833b1f39ee69b12a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}