{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107921629",
    "entityType": "Track",
    "nonce": "0x42d7cae3f40cdd149e0af01c99d90b05a165dee60c16471b1f1c7732af3a73da",
    "signature": "0x117c380938b44423d4ba86fd4084d7b42d73c64c943afe2b174b1af898d08cb21da365eb27f182e22e03f27efa46ff59f566e644b4830d4c8d85cf9d77dcbd5d1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}